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Finding the Fourth Proportional to 28,019.76, 42,025.02 and 11,379.12

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Solution

The fourth proportional to 28,019.76, 42,025.02 and 11,379.12 is: 17,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.76 : 42,025.02 = 11,379.12 : x
  2. Step 2: Convert to fraction form
    28,019.76/42,025.02 = 11,379.12/x
  3. Step 3: Cross multiply
    28,019.76x = 42,025.02 × 11,379.12
  4. Step 4: Simplify right side
    28,019.76x = 478,207,745.58
  5. Step 5: Solve for x
    x = 478,207,745.58/28,019.76
  6. Step 6: Final answer
    x = 17,066.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.